Compositions and method to improve the strength development of calcium silicate-based cements and concretes

Patent metadata

Field	Value
Publication number	US-11667573-B2
Application number	US-201816198129-A
Country	US
Kind code	B2
Filing date	Nov 21, 2018
Priority date	Nov 21, 2017
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

Calcium silicate-based cements and concretes are disclosed, which result in concrete compositions that have an improved strength development. A cement product includes a plurality of particles of a carbonatable calcium silicate cement and a first additive; wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group.

First claim

The invention claimed is:

1. A concrete product comprising:
a cement product, wherein the cement product comprises a plurality of particles of a carbonatable calcium silicate cement and a first additive, wherein the first additive is an organic molecule with at least one primary, secondary or tertiary amine group, and a second additive wherein, the second additive is a source of calcium sulfate,
wherein the cement product is cured with a gas comprising carbon dioxide to produce a structure comprising of a core, wherein the core comprises a portion of unreacted calcium silicate particle; a silica-rich layer covering at least a portion of the surface of the core; and an exterior layer covering at least a portion of the silica-rich first layer, wherein the exterior layer comprises calcium carbonate; and
a plurality of aggregate particles.

2. The concrete product of claim 1 , wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group comprising at least one hydroxy group.

3. The concrete product of claim 2 , wherein, the first additive is one or a combination of one or more hydroxyalkylamine(s) that has a maximum molar weight of 1000 g/mol.

4. The concrete product of claim 3 , wherein, the first additive is selected from the group consisting of N,Nbis-(2-hydroxyethyl)-2-propanolamine) (DI EPA), N, Nbis-(2-hydroxypropyl)-N-(hydroxyethyl) amine (EDIPA), diethanolamine (DEA), triethanolamine (TEA), triisopropanolamine (TIPA), triethylenepentamine (TEPA), hydroxyethyldiethylenetriamine (HEDETA) and aminoethylethanolamine (AEEA) or a combination thereof.

5. A method for preparing a concrete product comprising:
mixing a cement product with a plurality of aggregate particles to form a concrete product having a plurality of pores, wherein the cement product comprises a plurality of particles of a carbonatable calcium silicate cement and a first additive, wherein the first additive is an organic molecule with at least one primary, secondary or tertiary amine group;
placing and forming the concrete product in molds;
curing the formed concrete product with a gas comprising carbon dioxide to produce a structure comprising a core, wherein the core comprises of a portion of unreacted carbonatable calcium silicate particle;
a silica-rich layer covering at least a portion of the surface of the core; and
an exterior layer covering at least a portion of the silica-rich first layer, wherein the exterior layer comprises calcium carbonate.

6. A carbonatable composition comprising:
one or more discrete calcium silicate phases selected from CS (wollastonite or pseudowollastonite), C3S2 (rankinite), C2S (belite, larnite, bredigite), and an amorphous calcium silicate phase at about 30% or more by mass of the total phases; and calcium aluminate accounting for about 0.1% to about 2.5% by weight of the carbonatable composition,
wherein elemental Ca and elemental Si are present in the composition at a molar ratio from about 0.8 to about 1.2; and metal oxides of Al, Fe and Mg are present in the composition at about 30% or less by mass,
first and the second additives, wherein the first additive is an organic molecule with at least one primary, secondary or tertiary amine group, and the second additive is a source of calcium sulfate.

7. The carbonatable composition of claim 6 , wherein the first and second additives are triethanolamine and gypsum.

Assignees

• Solidia Technologies Inc

Inventors

• Briaud Vincent
• Cervera Frédéric
• Meyer Vincent
• Sahu Sadananda
• Tas Ahmet Cuneyt
• Ravikumar Deepak
• Bryant Jason Elizan
• Seth Anuj

Classifications

• C04B2111/00019

  Carbon dioxide sequestration · CPC title

• C04B40/0231

  Carbon dioxide hardening · CPC title

• C04B2201/52

  High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC] · CPC title

• C04B22/143

  Calcium-sulfate · CPC title

• B32B13/04

  comprising such {water setting} substance as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a glass layer B32B17/06)} · CPC title